Variables

Variables are those entities whose value can be changed during the execution of the program.

• Any variable name can be of at the most 40 characters in length.
• The first character in the variable name must be a letter.
• The characters allowed are letters, numbers, and the decimal point.
• Reserved words of BASIC can not be used as variable names.
• Variables may represent either numeric values or strings.

  Example 6

Table C 2.9 Variables

Valid                                      invalid varialbe names
variable names             Variable                     Invalid reason
N                                N$ 1                   The last character should be $
TOTAL 1 ABC          0 TO 6                First character should be a letter
AS SUM %               A - Z                   Special characters are not allowed